Turning-lathe.



l (Application filed Oct. 27, 1899.:

5 Sheets-Sheet (No Model.)

No. 662,37I. Patented Nov. 20, |900'.

F. R.YCLARK.

TURNING LATHE.

(Application med oct. 27. 1h99.) (No Modal.) '5 sheets-sheet 2.

WL'/neasea': Inven TH'E mams Pzrzns no` novo-urna, wAsHmumN. D. c..

No. 662,37I. Paten'zed Nov. 20, |900. F. R.CLARK.

TURNING LATHE.

(Application ledct. 27. 189.9.)

5 Sheets-Sheet 3.

Tu: Nonms Pneus co, Pnoouma., WASHINGTON. u, c.

No. 662,37I. Patented Nov. 20, |900.

F. B. CLARK.

TURNING LATHE. (Apphcamn med ont 27 1899) 5 Sheets--Sheet f1.

(No Model.)

.mi Y

fnl/vena?? my Q/M YN: Nomus Parmis co. Pnoruuwo., wAsmNuYoN. n. c.

No. 662,37I. Patented Nov. 20, |900.

F. R. CLARK.

TURNING LATHE.

(Appleation filed Oct. 27, i899.) (No Modal.) l 5 Sheets-Sheet 5.

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TH: Nonms Pinus co, PNoToLmm. wAsHmGToN, u. c.

IINTTsn STATES@ iFaTnNT Crricn.

FRANK R. CLARK, OF ST. ALBANS, WEST VIRGINIA, ASSIGNOR TO THE MONTAGUE MANUFACTURING COMPANY, OF SAME PLACE.

TURNING-LATHE.

SPECIFICATION forming part of Letters Patent No. 662,371 dated November 20, 190C;

Application flied October 27,1899. Serial No. 735,002. (No model.)

T @ZZ whom, it may concern:

Be it known that I, FRANK R. CLARK, a citizen of the United States, residing at St; Albans, in the county of Kanawha and State of West Virginia, have invented or discovered a new and useful Improvement in TurningLathes, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification, in which- Figure l is a perspective view of the lathe complete. Fig. 2 is an elevation from the back. Fig. 3 is an end elevation. Fig. 4 is a vertical cross-sectional View taken on the line IV IV of Fig. 2. Fig. 5 is a detail view of the spindle-driving mechanism. Fig. 6 is a plan view. Fig. 7 is a cross-section, on an enlarged scale, of the upper portion of the lathe,illustrating the spindle-feedingmechanism, taken on the line VII VII of Fig. 6. Fig. 8 is a cross-sectional view taken on the line VIII VIII of Fig. 7. Fig. 9 is a view similar to Fig. 7, but showing the parts in a dierent position. Fig. 10 is a detail perspective View showing the mechanism for lifting the nutsupporting bar. Fig. ll is a sectional detail view showing the lifting-dog and arm raised.

My invention relates to woodturning lathes, and has for its object the automatic turning of balusters, dac., in a much more uniform, economical, and expeditious manner than heretofore; and it consists in the novel arrangement and construction of the parts and their method of operation, as I shall now proceed to describe.

Referring now to the drawings, 2 is the frame or bed of the lathe, supported u pon suit* able legs 3 and provided at each end with upright pillow-block bearings 4L. In these bearings is journaled the shaft 5, upon which at one end is rigidly mounted the spindle-drum 6, provided with oppositely-located spindlesockets 7, adapted to receive the end of the blank, the sockets being secured to the inner endscf shox tshafls 8, journaled in the spindledrum and bearing at their outer ends the driving-pulleys I).

At the outer end of shaft. 5, in spline engagement and longitudinallyv adjustable on the shaft, is the chuck-head l0, provided with oppositely-disposed arms having bearings corresponding in location to the spindle-sockg ets 7, and mounted by screw-threadsin these bearings are the centering-chucks l1, having hand-wheels 12 and locking-wheels I3.

Adjacent to the spindle-drum 6 is an eX- tension 14. of the pillow-block bearing a, in which at upperand lower positions equidistant from the center of shaft 5 are journaled the shafts l5 16, each shaft having on its inner end a pulley 17 and 17, respectively, in alinement with the pulleys 9. Around these pulleys passes a belt 18, leading off from a power-pulley 19, constantly driven, and when the spindle-drum 6 is in operative position, as shown in Figs. 3 and 6, one of its pulleys 9 will be thrown into contact with the belt IS, exerting a frictional tension upon itsufiicient to impart rotary motion to pulley?) and to the spindle-socket 7 and likewise the blank held therein to be operated upon. When, how ever, both of the pulleys 9 are out of contact with the belt, as in the act of turning Lo dis charge the finished article and to bring the new blank into the path of the knives, both pulleys 9 are out of contact and inoperative. This is indicated in Fig. 5. It will also be understood that one only of the pulleys 9 can be in Contact, the opposite one extending forwardly from the front of the machine, with its chuck-spindle, and in such inoperative position affords an opportunity for releasing the finished article and filling with `a new blank.

The cutter-knives 2O are adjustably set in heads 2l, mounted upon shaft 22, and adapted to be secured in any desired arrangement, so as to provide a spiral leading cut, as shown in Fig. 2, by means of set-screws 23. The shaft 22 is of sufficient length to accommodate as many knives as may be desired and is journaled in the upper ends of arms 24, bearing at their lower ends upon shaft 25,1esting in bearings 26 of the frame. This shaft is continuously driven by means of belt 27 and pulley 28 at one end, the other end being provided with pulley 29, adapted to transmit rotatory motion at a high speed to shaft 22 through belt 30 and pulley 3l at whatever' p0- sition the shaft 22 may be in.

Shaft 5 is free to rotate in its bearings and is turned by the operator a half-revolution IOO for each blank operated upon. The shaft and its parts are held against rotation by means of a spring locking-arm 32, provided with a handle and a projecting key, which fits into one ot' two notches 33, oppositely located on the face of the spindle-drum 6, so that movement cannot be imparted to rotate the shaft and heads until this spring lockingarm is Withdrawn.

Forward movement of the cutting-knives 2O (which constantly rotate by reason of belt 30) is accomplished through curved cam-arms 34, keyed to shaft 35, mounted in bearings 36 at the back of the machine, which camarms bear upon the cutter-supporting arms 24 and in their travel throw it forward. Oounteracting springs 37 tend to throw the arms backwardly when the cam-'arms are reversed, and this action is clearly shown in Fig. 7, the springs being coiled around rods 38, pivoted to arms 24, and having bearings 39 on the upper side of the main frame.

Located about midway across the bed of the machine and in bearings 40 thereon is a rod 41, provided with a screw-threaded portion 41 and a reduced smooth portion 42, having on its outer end a worm-Wheel 43. ,A shaft 44 is mounted in bearings 45 in the front of the machine and provided with one or more pulleys 46, constantly driven by belt 47 from pulleys 48, mounted on the outer end of short shaft 16, carrying pulley 17 in constant engagement with belt 18. rlhe shaft 44 Icarries at its end a worm-gear 49, which intermeshes with and imparts motion to Wormwheel43, and consequently to the rod 41, which in its turn engages by the threaded portion 41' a half-nut 50, adapted to bear upon the under side in engagement with the,

threads or to fall by gravity out of engagement when unsupported. This half-nut has a bearing and slides upon a longitudinal bar 51, pivoted at 52 and su pported at the other end upon a trigger 53, which trigger' is secured to a sliding rod 54, havinga long bearing to-give rigidity and a limiting-nut 54 on its outer end. The trigger is held outwardly in Aa supporting position just under 'the end of side flanges 5l of bar 51 by means of coiled spring 55, as in Fig. 7, and the trigger is thrown back out of engagement by means of downwardly-depending knocker-arms 56 of the half-nut, which in the forward travel of the nut and near the desired limit of its movement come into contact with adjustable nuts 57, mounted upon a screw-threaded portion 54 of rod 54. These nuts 57 `may be set, one actingas a lock-nut for the other,at any position on the threaded portion of rod 54, so that the time of contact of the knocker-arms and dislodgment of the trigger may be very accurately regulated in reference to the desired travel of the knives. Forward mot-ion of the half-nut will continue until the trigger is thrown outwardly from under the end of anges 51', compressing spring 55 and permitting bar 51 to fall by gravity, and with it the half-nut 50, thus disengaging the halfnut from the screw-thread 41'. The purpose of this construction is to provide an automatic forward feed of the cutters toward the spindle and against its surface, and motion is imparted by means of a crank-arm 58, keyed to the shaft 35, carrying cam-arms 34, which crank-arm 58 is pivotally connected kwith link-bars 59, attached at the opposite end to a sliding cross-head 60, mounted on' the portion 42 of rod 41 and also by means ot' stud-bolts 6l to rods 62, which connect the' cross-head with the half-nut 50. These linkbars 59 and rods 62 are in pairs disposed at each side of the rod 41 for convenience and equalization of the strain, and it will be noted that the half-uut 50 is provided with lateral lugs 63 for engagement with the ends of rods 62 at each side. `Als thus connected the forward travel of the half-*nut when in engagement with the constantly-operating threaded portion 4l of rod 41 will draw the crank-arm 58 gradually forward until the cutters have done their required work and the half-nut has dislodged the trigger, releasing the half-nut, as has been described, when the cams 34, crank 58, link-bars 59, cross-head 60, rods 62, and half-nut will be thrown back into initial position again by expansive action of springs 37, in which posit-ion they will remain until the half-nut is again raised into engagement.

It will be noted that when the spindle-drum is being turned and both pulleys 9 are out of engagement with belt 18 the belt will be slack and will consequently not impart movement to the worm-gear feeding mechanism, so that although vthe half-nut may be in' engagement with screw 41" it will not feed forward the cutter-shaft until the blank is in position and tension has been exerted on the belt, thereby driving pulley 17', shaft 16, and pulleys 48. This state of rest of the cutterfeed is of advantage in that it allows the drum to be held in an inoperative position for anA indefinite time, if desired, and there is no loss of movement, the full trave] of the cutters taking place after the blank is in position. During this state of rest of the cutters, theblank having been turned, the operator having already placed anew blank in front draws back the spring-arm'32 and gives the spindle-drum 6, shaft 5, and its assembled parts a half-rotation, throwing the new blank into range of the cutters and bringing the finished article in front of him, so that it may be removed and a fresh blank inserted during the cutting operation at the other side. During the half-rotation ofthe spindie-drum the bar 51 is thrown up, raising the half-nut into screw engagement and permitting the trigger to rengage itself under the ends of fianges 51' under action of spring 55 by means of a raising dog 64, located immediately under the bar 51. This dog is normally in a lowered position out of contact, as iu Fig. 7, permitting a free fall of the bar, and is raised only during the rotation of the IOO IIO

spindle-driiin 6 andv then only momentarily, so as to hold the bar 5l up long enough to permit of engagement of the trigger.

The dog is secured on one end of a rockshaft 65, mounted in suitable bearings on the bed of the machine, and at the other end is an arm 66, secured to the rock-shaft, extending upwardly into the path of the periphery of the spindle-drum 6, which is provided with oppositely-located recesses 67 in such a position that when the drum 6 is at rest the curved shoe end 68 of arm 66 will be thrown into one of the recesses by reason ot' the retracting action of a coiled spring 69, the saine action throwing the dog 64 down free from contact with the bar 51. Upon rotation of the drum the arm (itl will be thrown outwardly by action of the peripheral face of the drum,.the shaft 65 will be partially rotated against the force of the spring, and the dog 64 will be raised, lifting bar 5l and half-niit 50, as has been described, and again setting the cutter feed mechanism into motion. This operation is continuously carried on, and the work of turning a blank is rendered extremely simple, accurate, and rapid, while the time required to recharge thelathe is reduced to a minimum, and such operation is performed while the lathe is working.

The advantages of my invention will be appreciated by those skilled in the art to which it refers, and it will be understood that various changes and modifications may be made in its design, construction, arrangement of lcutters, and in other details without departing from my invention as embodied in the following` claims.

What I claim isl. A turning-lathe provided with a rotating work-siipportingstructnre,oppositely-located independently-rotatable blank holding and centering devices thereon, rotating cut-ters mounted on a supporting-shaft journaled in swingingarnis pivot-ally mounted on a powershaft, a driving-pulley on the power-shaft, a driven pulley on the cutter-shaft, a connecting-belt and means for advancing the cutters toward the work, substantially as set forth.

2. A turning-lathe provided with a rotating` work-supportingstructure,oppositely-located independently-rotatable blank holding and centering devices thereon, rotating cutters mounted on a supporting-shaft journaled in swingingarins pvotally mounted on a powershaft, a drivingepulley on the power-shaft, a driven pulley on the cutter-shaft, a connecting-belt and means for advancing the cutters toward the work and retracting them therefrom, substaniially as set forth.

3. Aturning-lathe provided with a rotating work-supportingstructure,oppositely-located independeiitly-rotatable blank holding and centering devices thereon` rotating cutters mounted on a supporting-shaft journaled in swinging arms pvotally mounted on a powershaft, a driving-pulley on the power-shaft, a driven pulley on the cutter-shaft, a connecting-belt, means for advancing the cutters toward the work and means for arresting their forward travel, substantially as set forth.

4. Aturning-lathe provided with a rotating work-sup[ ortingstructure,oppositelylocated iiidependentlv-rotatable blank holding` and centering devices thereon, rotating cutters mounted on a supporting-shaft journaled in swinging arms pvotally mounted on a powershaft, a d riviiig-pulley on the power-shaft, a driven pulley on the cutter-shaft, a connecting-belt, means for advancing the cutters toward the work and adjustably arranged means for arresting their forward travel at any desired point of operation, substantially as set forth.

5. A turning-lathe provided with a rotating work-s u pporti ng structure,oppositely-located independently-rotatable blank holding and centering devices thereon, rotating cutters mounted on a supportii'ig-shaft journaled in swinging arms pivotally iuoiinted on a powershaft, a driving-pulley on the power-shaft, a driven pulley on the cuttershaft, a connecting-belt, means for advancing the cutters toward the work and a holding device for retaining the supporting structure in operative position, substantially as set forth.

6. A turning-lathe provided with a rotatable work-supporting` shaft, a spindle-drum thereon provided with spindle-sockets, a longitudinally-adjustable chuck-head mounted on the shaft provided with centering-chucks in alineinent with the spindle-sockets, rotating cutters mounted on a supportingshaft journaled in swinging arms pivotally mounted on a power-shaft, a driving-pulley on the power-shaft, a driven pulley on the cuttershaft, a connecting-belt, and means for advancing the cutters toward the work,substan tially as set forth 7. A turning-lathe provided with a rotatable work-supporting shaft, a spindle-drum thereon provided with oppositelylocated spindle-sockets, a longitudinally-adjustable chuck-head mounted on the shaft provided with oppositely-loeated centering-chucks in alinement with the spindle-sockets, rotating cutters mounted on a supporting-shaft journaled in swinging arms pivot-ally mounted on a power-shaft, a driving-pulley on the powershaft, a driven pulley on the cutter-shaft,a connecting-belt, and means for advancing the cutters toward the work, substantially as set forth.

8. A turning-lathe provided with a rotatable work-supporting shaft, a spindle-druin thereou provided wiih oppositely -located spindle-sockets secured to driving-shafts carrying pulleys, a d riving-belt adapted to make driving-contact with one of the pulleys when in operative positioma longitudinally-adjustable chuck-liead mounted on the shaft provided with oppositely located centeringchucks iii alineineut with the spindle-sockets, rotating cutters mounted ou a supportingshaft joiirnaled in swinging arms pvotally IOO IIO

mounted on a power-shaft, a driving-pulley on the power-shaft, a driven pulley on the cutter-shaft, a connecting-belt and means for advancing the cutters toward the work, substantially as set forth.

9. A turning-lathe provided with a rotatable work-supporting shaft, a spindle-drum thereon provided with oppositely located spindle-sockets, a longitudinally-adjust-able chuck-head mounted on the shaft provided with oppositely-located centering-chucks in alinement with the spindle-sockets, rotating -cutters mounted on a supporting-shaft journaled in swinging arms pivotally mounted on a power-shaft, a driving-pulley on the powershaft, a driven pulley-on the cutter-shaft, a connecting-belt, means foradvancing the cutters toward the work, means for locating the contained blank in proper range of the cutters and simultaneouslyimparting a rotary movement to the blank, substantially as set forth.

10. A turning-lathe provided with a rotatable work-supporting shaft, a spindle-drum thereon provided with oppositel y located spindle-sockets, a longitudinally-adjustable chuck-head mounted on the shaft provided with oppositely-located centering-chucks in alinement with thespindle-sockets, rotating cutters mounted on a supporting-shaft journaled in swinging arms pivotally mounted on a power-shaft, a driving-pulley on the powershaft, a driven pulley on the cutter-shaft, a connecting-belt, means for advancing the cutters toward the work, means for locking the spindle-drum in operative position whereby the blank is located in range of the cutters and whereby the inoperative centering-chuck and spindle-socket are located in position for removal and renewal, substantially as set forth.

1l. A turning-lathe provided with a rotatable Work-supporting shaft, a spindle-drum thereon provided with oppositely located spindle-sockets, a longitudinally-adjustable chuck-head mounted on the shaft provided with oppositely-located centering-chucks in alinement with the spindle-sockets, rotating cutters mounted on a supporting-shaft journaled in swinging arms pivotally mounted on a powershaft, a driving-pulley on the powershaft, a driven pulley on the cutter-shaft, a con necting-belt,1neans for advancing the cu tters toward the work, and a spring-arm adapted to interlock with the spindle-drum and hold it in position, substantially as set forth;

l2. A turning-lathe provided with a rotatable work-supporting shaft, a spindle-drum thereon provided with oppositely located spindle-sockets secured to driving-shafts carrying pulleys, a driving-belt passing around upper and lower pulleys mounted in the frame of the machine and in the path of the spindle-socket pulleys, a longitudinally-adjustable chuck-head mounted on the shaft pro- -vided with op positel y-located adjustable centering-chucks i-n alinement with the spindlesockets, rotating cutters adjustably mounted on a driving-shaft, supporting-arms for the driving-shaft journaled on a power-shaft, means for transmitting power from the powershaft to the cutter-driving shaft, feeding devices for the cutter-supporting mechanism adapted to be automatically thrown into gear when the blank is placed in position to be operated upon and means for disengaging such feeding devices.

13. A turning-lathe provided with a rotatable Work-supporting shaft, a spindle-drum thereon provided with oppositely -located spindle-sockets secured to driving-shafts carrying pulleys, a driving-belt passing around u pperand lower pulleys mounted in the frame of the machine and in the path of the spin- (lle-socket pulleys, a longitudinally-adjustable chuck-head mounted on the shaft provided with oppositely-located adjustable centering-chucks in alinement with the spindlesockets, rotating cutters adjustably mounted on a driving-shaft, supporting-arms for the driving-shaft journaled on a power-shaft, means for transmitting powerfrom the powershaft to the cutter-driving shaft, feeding devices for the cutter-supporting mechanism adapted to be automatically thrown into gear when the blank is placed in position to be operated upon, means for disengaging such feeding devices and means for returning the cutter-supporting mechanism and feeding devices to the initial position.

14. In a lathe of the class described provided with a constantly-driven cutter-shaft mounted on swinging arms, and apower-imparting belt adapted to be thrown into operative tension by movement of the work-supporting structure; feeding mechanism for the cutters consisting of a threaded shaft, gearing whereby such threaded shaft is rotated from the power-imparting belt when under tension, a nut adapted to engage the threaded shaft, and means connecting the nut with mechanism adapted to im partforward movement to the cutter-shaft arms.

l5. In a lathe of the class described provided with a constantly-driven cutter-shaft mounted on swinging arms, and a power-imparting belt adapted to be thrown into operative tension by movement of the work-supporting structure; feeding mechanism for the cutters consisting of a threaded shaft, gearing whereby such threaded shaft is rotated from the power-imparting belt when under tension, a nut adapt-ed to engage the threaded shaft, means connecting the nut with mechanism adapted to impart forward movement to the cutter-shaft arms and means for disconnecting the nut from the threaded shaft.

l. In a lathe of the class described provided with a constantly-driven cutter-shaft mounted on swinging arms, and a power-imparting belt adapted to be thrown into operative tension by movement of the work-supporting structure; feeding mechanism forthe cutters consisting of a threaded shaft, gear- IOO IIO

ing whereby such threaded shaft is rotated from the power-imparting beltl when under tension, a nut adapted to engage the threaded shaft, means connecting the nut with mechanism adapted to impart forward movement to the cutter-shaft arms, means for disconnecting the nut from the threaded shaft and for retracting the cutter-shaft arms.

17. In a lathe of the class described provided with rotating cutters, mechanism for advancing the cutters, work supporting mechanism provided with a spindledrum, a feedi 11g-screw, and a half-nut adapted to engage the screw; a sliding bar for the half-nut and a supporting-dog therefor mounted on a rock-shaft provided with an arm adapted to bear against the spindle-drum.

18. In a turning-lathe, in combination with a rotating work-supporting shaft, oppositelylocated independently-rotatable blank holding and centering devices thereon and rotating cutters mounted on a supporting and driving mechanism; a rotating shaft provided with a threaded portion, a half-nut adapted to engage the thread thereof, connections therefrom to the cutter-supporting mechanism, a pivoted slide-bar adapted to support the half-nut in engagement, and a trigger adapted to support the slide-bar with means for dislodging the trigger, substantially as set forth.

19. In a lathe of the class described, a rotating threaded shaft, a half-nut adapted to engage the shaft having.Y knocker-arms, connections from the nut to the cutter-supportn ing mechanism, a pivoted slide-bar adapted to support the half-nut in engagement, a trigger adapted to support the slide-bar mounted on a movable rod provided with adjustable nuts in the path of the knocker-arms, and means for raising the slide-bar.

20. In a lathe of the class described, a rotating' threaded shaft, a halfnut adapted to engage the shaft having knocker-arms, connections from the nut to the cutter-supporting mechanism, apivoted slide-bar adapted to support the half-nut in engagement, a trigger adapted to support the slide-bar mounted on a movable rod provided with adjustable nuts in the path of the knocker-arms, means for raising the slide-bar and a spring adapted to force the trigger into supporting engagement with the slide-bar.

2l, In a lathe of the class described, a rotating threaded shaft, a half-nut adapted to engage the shaft having knocker-arms, connections from the nut to the cutter-supporting mechanism, a pivoted slide-bar adapted to support the half-nut in engagement, a trigger adapted to support the slide-bar mounted on a movable rod provided with adjustable nuts in the path of the knocker-arms, an intermittently-movable dog adapted to support the slide-bar and means for raising the dog.

22. In a lathe provided with cutters mounted on a rotating shaft supported in pivoted arms, cams adapted to bear upon the arms to press them forward toward the blank and forwardlytraveling feeding mechanism c onnected with and adapted to impart motion to the cam-operating shaft.

23. In a lathe provided with cutters mounted on a rotating shaft supported in pivoted arms, cams adapted to bear upon the arms to press them forward toward the blank, forwardlytraveling` feeding mechanism connected with and adapted to impart motion to the cam-operating shaft and means for disconnecting the feeding mechanism andl for re- `tracting the pivoted arms.

24. In a lathe provided with cutters mounted on a rotating shaft supported in pivoted arms, cams adapted to bear upon the arms to press them forward toward the blank, a camshaft, a lever secured to the shaft, and forwardly-traveling feeding mechanism connected with the lever and adapted to rotate the cam-shaft.

25. In a turning-lathe, the combination of a rotating work-supporting shaft, oppositelylocated independently-rotatable blank holding and centering devices, a spindle-drum mounted on the shaft and carrying such devices, oppositely-located recesses on the periphery of the drum, a partially-rotatable spring-actuated arm mounted on a shaft provided with a raising-dog, a feed-nut-supporting bar adapted to be raised by the dog upon rotation of the drum, the arm being adapted to spring back to engage one of the recesses when the drum is at rest in operative position, permitting the dog and supporting-bar to fall by gravity, a spring locking-arm adapted to engage oppositely-located notches in the face of the drum, independent drivingpulleys mounted on the outer ends of the shafts of the blank holding` and centering devices and a slack driving-belt adapted to come into contact with the driving-pulleys when the blank-holding` devices are in operative positions and to be released from contact when the blank-holding devices are in positions of rest, with guiding-pulleys for the belt, substantially as set forth.

In testimony whereof I have hereunto set my hand.

FRANK R. CLARK. Witnesses:

THOMAS KIDAVISON, E. H. REID.

IOO

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